Worldline description of the Isgur-Wise function

Details Worldline description of the Isgur-Wise function Worldline description of the Isgur-Wise function

1996-10-25

arxiv.org/abs/hep-ph/9610491v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, using Worldstyle and comprising three eps files (5 pages in total). Invited talk presented by the first author at the I

Scientific paper

An effective field theoretic description of the Isgur-Wise function in heavy-meson transitions is presented which emulates soft interactions by a fermion worldline with an infinitesimal self-intersecting loop. A point-splitting regularization technique is used, which replaces pointlike worldlines by ``ribbons'' in the sense of Witten. The calculated vertex function is correctly normalized, does not depend on the heavy-quark mass, and complies with different sets of recent experimental data of the ARGUS and CLEO collaborations.

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